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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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#1
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Drilling a hole in plywood
Is there a knack for drilling a hole in plywood or am I using the wrong
type of drill. I need an 8mm dia hole and I am using progressively larger HSS twist drills but the exit hole is ripping the final ply to shreds. Should I consider something like a auger or one og those flat drills, if they are avialble in 8mm. The exact size is not important as long as it is about 8mm dia. Kevin |
#2
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Drilling a hole in plywood
"Kev" wrote in message
oups.com... Is there a knack for drilling a hole in plywood or am I using the wrong type of drill. I need an 8mm dia hole and I am using progressively larger HSS twist drills but the exit hole is ripping the final ply to shreds. Should I consider something like a auger or one og those flat drills, if they are avialble in 8mm. The exact size is not important as long as it is about 8mm dia. Kevin get a piece of scrap wood behind it if you can and hold if firmly against it. You then drill through the ply and into the scrap with no ripping Paul |
#3
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Drilling a hole in plywood
Paul-S8 wrote:
"Kev" wrote... Is there a knack for drilling a hole in plywood or am I using the wrong type of drill. I need an 8mm dia hole and I am using progressively larger HSS twist drills but the exit hole is ripping the final ply to shreds. get a piece of scrap wood behind it if you can and hold if firmly against it. You then drill through the ply and into the scrap with no ripping He could also use an auger (from each side) but the above may be easier... maybe drill a pilot hole and use a rose bit on each side, or other imaginitive methods. |
#4
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Drilling a hole in plywood
I seem to recall that such a scrap of wood has a curious name: "spelch
block". Always willing to be corrected... Mungo |
#5
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Drilling a hole in plywood
Kev wrote: Is there a knack for drilling a hole in plywood or am I using the wrong type of drill. I need an 8mm dia hole and I am using progressively larger HSS twist drills but the exit hole is ripping the final ply to shreds. Should I consider something like a auger or one og those flat drills, if they are avialble in 8mm. The exact size is not important as long as it is about 8mm dia. Don't use flat drill bits or hss drill bits. These are better for reducing break through damage in wood. http://www.tool-net.co.uk/data/index.php?ToolID=315691 Just take it easy and don't go at it like a bull at a gate ;-) Paul. |
#7
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Drilling a hole in plywood
On 7 Feb 2006 05:12:13 -0800, "Kev" wrote:
wrote: Kev wrote: Is there a knack for drilling a hole in plywood or am I using the wrong type of drill. I need an 8mm dia hole and I am using progressively larger HSS twist drills but the exit hole is ripping the final ply to shreds. Should I consider something like a auger or one og those flat drills, if they are avialble in 8mm. The exact size is not important as long as it is about 8mm dia. Don't use flat drill bits or hss drill bits. These are better for reducing break through damage in wood. http://www.tool-net.co.uk/data/index.php?ToolID=315691 Just take it easy and don't go at it like a bull at a gate ;-) Paul. I have some like these but they are very long drills so I will invest in a shorter one. At the end of the day the reverse side is hidden, so will the front side be when the job is finished come to that, it is just frustrating not to be able to bet a clean hole and believe me I am being as gentle as I can. Kevin It's not being gentle, it's putting a piece of sgrap wood on the back of where you are drilling from and using sharp bits. |
#8
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Drilling a hole in plywood
EricP wrote: On 7 Feb 2006 05:12:13 -0800, "Kev" wrote: It's not being gentle, it's putting a piece of sgrap wood on the back of where you are drilling from and using sharp bits. It is actually difficult getting to the reverse to hold some wood and drill at the same time but I will check the sharpness of the drills. Kevin |
#9
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Drilling a hole in plywood
In article .com
Kev wrote: Is there a knack for drilling a hole in plywood or am I using the wrong type of drill. I need an 8mm dia hole and I am using progressively larger HSS twist drills but the exit hole is ripping the final ply to shreds. Should I consider something like a auger or one og those flat drills, if they are avialble in 8mm. The exact size is not important as long as it is about 8mm dia. One of these should be better than a regular twist bit http://www.tooled-up.com/Product.asp?PID=3856 |
#10
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Drilling a hole in plywood
"Kev" wrote in message oups.com... Is there a knack for drilling a hole in plywood or am I using the wrong type of drill. I need an 8mm dia hole and I am using progressively larger HSS twist drills but the exit hole is ripping the final ply to shreds. Should I consider something like a auger or one og those flat drills, if they are avialble in 8mm. The exact size is not important as long as it is about 8mm dia. There are proper wood twist drills, with a central spike and a small cutter on the outer edge, which cuts the circle before you start to drill it. I always use those for holes up to 10mm. Colin Bignell |
#11
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Drilling a hole in plywood
nightjar wrote: "Kev" wrote in message oups.com... Is there a knack for drilling a hole in plywood or am I using the wrong type of drill. I need an 8mm dia hole and I am using progressively larger HSS twist drills but the exit hole is ripping the final ply to shreds. Should I consider something like a auger or one og those flat drills, if they are avialble in 8mm. The exact size is not important as long as it is about 8mm dia. There are proper wood twist drills, with a central spike and a small cutter on the outer edge, which cuts the circle before you start to drill it. I always use those for holes up to 10mm. Colin Bignell That sounds like this http://www.tooled-up.com/Product.asp?PID=3856. Somebody else mentioned it. Kevin |
#12
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Drilling a hole in plywood
"Kev" wrote in message oups.com... nightjar wrote: "Kev" wrote in message oups.com... Is there a knack for drilling a hole in plywood or am I using the wrong type of drill. I need an 8mm dia hole and I am using progressively larger HSS twist drills but the exit hole is ripping the final ply to shreds. Should I consider something like a auger or one og those flat drills, if they are avialble in 8mm. The exact size is not important as long as it is about 8mm dia. There are proper wood twist drills, with a central spike and a small cutter on the outer edge, which cuts the circle before you start to drill it. I always use those for holes up to 10mm. Colin Bignell That sounds like this http://www.tooled-up.com/Product.asp?PID=3856. Looks like it too. Somebody else mentioned it. Getting the same advice from two different people on a newsgroup is usually a sign that they are on the right track. Colin Bignell |
#13
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Drilling a hole in plywood
Kev wrote:
Is there a knack for drilling a hole in plywood or am I using the wrong type of drill. If you want a 100% perfect no splinter hole use a plunge router. -- Dave The Medway Handyman www.medwayhandyman.co.uk |
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